Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F13/00—Common details of rotary presses or machines
  • B41F13/08—Cylinders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N7/00—Shells for rollers of printing machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
  • B41N2207/02—Top layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
  • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
  • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2401/00—Materials used for the handling apparatus or parts thereof; Properties thereof
  • B65H2401/10—Materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/10—Rollers
  • B65H2404/18—Rollers composed of several layers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31652—Of asbestos
  • Y10T428/31663—As siloxane, silicone or silane

Definitions

• the invention relates to printing presses, and more particularly to a wear-resisting, ink-repellent coating process for printing-press components.
• sealing materials mentioned are Teflon and copying ink.
• both sealing materials are known to have an insufficiently long service life in rapid web-fed printing presses and, in the case of Teflon, also lead to substantial heating of the component which is to be coated, which may result in dimensional distortion.
• the sintering temperature of Teflon is in the region of 300° C. and is therefore sufficiently high to cause dimensional distortion on precision rollers, in particular where welded structures are involved.
• Ink-repellent surface properties are required not only to convey the printed paper in the printing press, but also, in the case of waterless offset printing (also known as the TORAY process), for substituting the film of dampening solution on the printing plate in the form of a silicone film.
• silicone encompasses a substantial group of synthetic polymeric compounds in which silicon atoms are crosslinked in chain and/or network form via oxygen atoms, and the remaining valences of the silicon being saturated by hydrocarbon radicals (usually methyl groups). Another name for silicones is polyorganosiloxanes.
• the invention is based on the object of finding a seal for low wear coatings on printing press components which provides a permanent ink-repellent surface quality and, in addition, has a high resistance to standard cleaning agents used in printing technology.
• the wear-resisting ink-repellent coating for printing press components comprises a wear resistant material in the form of one of metal oxides and low-wear hard metals, and a sealing material for treating the wear resistant material.
• the sealing material comprises a polyorganosiloxane sealant that cures in a temperature range of 100° C. to 170° C.
• the printing-press component is by a wear-resisting layer, preferably of oxide ceramic, such as for example Al 2 O 3 , Cr 2 O 3 , TiO 2 , SiO 2 ZrO 2 , Y 2 O a ,C e O, C a O, M g O or mixtures thereof, or of low-wear hard metals, such as for example WC/Co, Cr 3 C 2 /Ni,Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, molybdenum etc.
• the wear resisting layer is preferably applied by thermal spraying processes, such as atmospheric plasma spraying, halogen flame spraying, and high-speed flame spraying.
• the wear resisting layer is then sealed with a polyorganosiloxane sealant, and preferably with polyhydridomethylsiloxane, which cures at from 100° C. to 170° C.
• the coating which provides protection against wear is from 0.03 to 1.5 mm thick, and is preferably 0.1 mm thick.
• the coating, sealing and curing may also be performed on a printing-press component which consists not of steel but rather of lightweight construction materials, such as aluminum, magnesium, titanium or fiber-reinforced plastic.
• the oxide ceramic or hard metal layer which protects against wear does not have to be applied by thermal spraying, but may also be applied by coating processes such as PVD (physical vapor deposition), CVD (chemical vapor deposition), sintering, hot isostatic pressing, electro-deposition, explosive cladding, build-up welding, soldering, adhesive-bonding techniques or reactive processes.
• PVD physical vapor deposition
• CVD chemical vapor deposition
• sintering hot isostatic pressing
• electro-deposition explosive cladding
• build-up welding build-up welding
• soldering adhesive-bonding techniques or reactive processes.
• a surface roughness of the layer which protects against wear which is appropriate to its function, preferably of between 1.0 ⁇ m ⁇ Rz ⁇ 90 ⁇ m, where Rz is preferably within a range of 15 to 20 ⁇ m.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Coating By Spraying Or Casting (AREA)
• Sealing Material Composition (AREA)
• Paints Or Removers (AREA)
• Photoreceptors In Electrophotography (AREA)
• Other Surface Treatments For Metallic Materials (AREA)
• Printing Plates And Materials Therefor (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7886771

Family Applications (1)

Country Status (7)

Cited By (4)

Families Citing this family (26)

Citations (15)

Family Cites Families (1)

• 1998
  • 1998-11-05 DE DE19850968A patent/DE19850968A1/de not_active Withdrawn
• 1999
  • 1999-10-28 EP EP99121441A patent/EP0999043B1/de not_active Expired - Lifetime
  • 1999-10-28 ES ES99121441T patent/ES2193647T3/es not_active Expired - Lifetime
  • 1999-10-28 DE DE59905629T patent/DE59905629D1/de not_active Expired - Lifetime
  • 1999-10-28 DK DK99121441T patent/DK0999043T3/da active
  • 1999-10-28 AT AT99121441T patent/ATE240834T1/de not_active IP Right Cessation
  • 1999-11-05 US US09/434,239 patent/US6514623B2/en not_active Expired - Lifetime
  • 1999-11-05 JP JP11316014A patent/JP2000144053A/ja active Pending

Patent Citations (18)

Non-Patent Citations (1)

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